diff options
Diffstat (limited to 'sound/soc/fsl/fsl_esai.c')
| -rw-r--r-- | sound/soc/fsl/fsl_esai.c | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c index 496ce2eb2f1f..d719caf26dc2 100644 --- a/sound/soc/fsl/fsl_esai.c +++ b/sound/soc/fsl/fsl_esai.c @@ -39,6 +39,8 @@ * @fifo_depth: depth of tx/rx FIFO * @slot_width: width of each DAI slot * @hck_rate: clock rate of desired HCKx clock + * @sck_rate: clock rate of desired SCKx clock + * @hck_dir: the direction of HCKx pads * @sck_div: if using PSR/PM dividers for SCKx clock * @slave_mode: if fully using DAI slave mode * @synchronous: if using tx/rx synchronous mode @@ -55,6 +57,8 @@ struct fsl_esai { u32 fifo_depth; u32 slot_width; u32 hck_rate[2]; + u32 sck_rate[2]; + bool hck_dir[2]; bool sck_div[2]; bool slave_mode; bool synchronous; @@ -209,8 +213,13 @@ static int fsl_esai_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id, struct clk *clksrc = esai_priv->extalclk; bool tx = clk_id <= ESAI_HCKT_EXTAL; bool in = dir == SND_SOC_CLOCK_IN; - u32 ret, ratio, ecr = 0; + u32 ratio, ecr = 0; unsigned long clk_rate; + int ret; + + /* Bypass divider settings if the requirement doesn't change */ + if (freq == esai_priv->hck_rate[tx] && dir == esai_priv->hck_dir[tx]) + return 0; /* sck_div can be only bypassed if ETO/ERO=0 and SNC_SOC_CLOCK_OUT */ esai_priv->sck_div[tx] = true; @@ -277,6 +286,7 @@ static int fsl_esai_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id, esai_priv->sck_div[tx] = false; out: + esai_priv->hck_dir[tx] = dir; esai_priv->hck_rate[tx] = freq; regmap_update_bits(esai_priv->regmap, REG_ESAI_ECR, @@ -294,9 +304,10 @@ static int fsl_esai_set_bclk(struct snd_soc_dai *dai, bool tx, u32 freq) struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai); u32 hck_rate = esai_priv->hck_rate[tx]; u32 sub, ratio = hck_rate / freq; + int ret; - /* Don't apply for fully slave mode*/ - if (esai_priv->slave_mode) + /* Don't apply for fully slave mode or unchanged bclk */ + if (esai_priv->slave_mode || esai_priv->sck_rate[tx] == freq) return 0; if (ratio * freq > hck_rate) @@ -319,8 +330,15 @@ static int fsl_esai_set_bclk(struct snd_soc_dai *dai, bool tx, u32 freq) return -EINVAL; } - return fsl_esai_divisor_cal(dai, tx, ratio, true, + ret = fsl_esai_divisor_cal(dai, tx, ratio, true, esai_priv->sck_div[tx] ? 0 : ratio); + if (ret) + return ret; + + /* Save current bclk rate */ + esai_priv->sck_rate[tx] = freq; + + return 0; } static int fsl_esai_set_dai_tdm_slot(struct snd_soc_dai *dai, u32 tx_mask, @@ -439,8 +457,8 @@ static int fsl_esai_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt) static int fsl_esai_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { - int ret; struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai); + int ret; /* * Some platforms might use the same bit to gate all three or two of @@ -492,7 +510,8 @@ static int fsl_esai_hw_params(struct snd_pcm_substream *substream, bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; u32 width = snd_pcm_format_width(params_format(params)); u32 channels = params_channels(params); - u32 bclk, mask, val, ret; + u32 bclk, mask, val; + int ret; bclk = params_rate(params) * esai_priv->slot_width * 2; @@ -822,6 +841,7 @@ static int fsl_esai_probe(struct platform_device *pdev) static const struct of_device_id fsl_esai_dt_ids[] = { { .compatible = "fsl,imx35-esai", }, + { .compatible = "fsl,vf610-esai", }, {} }; MODULE_DEVICE_TABLE(of, fsl_esai_dt_ids); |